net: dsa: bcm_sf2: Unwind errors in correct order

In case we cannot complete bcm_sf2_sw_setup() for any reason, and we
go to the out_unmap label, but the MDIO bus has not been registered yet,
we will hit the BUG condition in drivers/net/phy/mdio_bus.c about the
bus not being registered. Fix this by dedicating a specific lable for
when we fail after the MDIO bus has been successfully registered.

Fixes: 461cd1b03e32 ("net: dsa: bcm_sf2: Register our slave MDIO bus")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index cd1d630ae3a9..b2b838724a9b 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -1622,7 +1622,7 @@ static int bcm_sf2_sw_setup(struct dsa_switch *ds)
                           "switch_0", priv);
         if (ret < 0) {
                 pr_err("failed to request switch_0 IRQ\n");
-                goto out_unmap;
+                goto out_mdio;
         }
 
         ret = request_irq(priv->irq1, bcm_sf2_switch_1_isr, 0,
@@ -1679,6 +1679,8 @@ static int bcm_sf2_sw_setup(struct dsa_switch *ds)
 
 out_free_irq0:
         free_irq(priv->irq0, priv);
+out_mdio:
+        bcm_sf2_mdio_unregister(priv);
 out_unmap:
         base = &priv->core;
         for (i = 0; i < BCM_SF2_REGS_NUM; i++) {
@@ -1686,7 +1688,6 @@ out_unmap:
                         iounmap(*base);
                 base++;
         }
-        bcm_sf2_mdio_unregister(priv);
         return ret;
 }